ABCDEFGHIJKLMNOP
1
LOG/ANTI-LOG (APPROXIMATE) FROM LINEAR POT WITH TWO RESISTORS
2
3
Log
Rload across wiper-GND
Antilog
Rload across input-wiper
Anti Ch. 2
Rload across input-wiper
Ch.2 2 ohms different
4
Rpot (max):45500V1:1
V2=(V1*Rp)/(Ra+Rb)
Rpot:45500V1:1V2=(V1*Rb)/(Rp+Rb)Rpot:43500V1:1V2=(V1*Rb)/(Rp+Rb)
5
Rload (Rl):6800Ratio:6.691176471
Rp=(Rb*Rl)/(Rb+Rl)
Rload:47000Ratio:0.9680851064Rp=(Ra*Rl)/(Ra+Rl)Rload:47000Ratio:0.9255319149Rp=(Ra*Rl)/(Ra+Rl)
6
Ra:
R before wiper
Rb:R after wiper
V2 calc uses Rb (vs Rp) in numerator; Rp (vs Ra) in denominator
V2 calc uses Rb (vs Rp) in numerator; Rp (vs Ra) in denominator
7
Rp calc uses Ra (vs Rb)
Rp calc uses Ra (vs Rb)
8
9
Pot dialRaRb Rp (parallel)V2 loaded/logV2 linearPotposRaRb Rp (parallel)V2 Anti-logPotposRaRb Rp (parallel)V2 Anti Ch.2
10
0455000000045500023118.918920043500022591.160220
11
14095045502725.9911890.062413951350.1140950455021883.456510.1721303454139150435021358.676730.1692035746
12
23640091003891.8238990.096590909090.2236400910020513.189450.3072955048234800870019995.110020.3031875463
13
331850136504538.8753060.12473249770.33318501365018984.781230.41826540543304501305018478.373140.4139128886
14
427300182004950.40.15349887130.44273001820017269.1790.5131215474261001740016781.121750.5090529248
15
522750227505235.1945850.18707015130.55227502275015329.74910.59743040695217502175014869.090910.5939524838
16
618200273005443.988270.2302483070.66182002730013119.63190.67541436466174002610012698.757760.6727019499
17
713650318505603.6222510.29104249460.77136503185010577.906020.75068517377130503045010213.988340.7488198094
18
89100364005729.629630.38636363640.889100364007623.8859180.826823876288700348007341.1131060.8257968866
19
94550409505831.6230370.56172556220.994550409504148.3996120.908014482894350391503981.4995130.9076892861
20
100455005915.8699811110045500011004350001
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46